Modeling and Simulation of Turbulent Flows through a Solar Air Heater Having Square-Sectioned Transverse Rib Roughness on the Absorber Plate

Table 2

Range of geometrical and operating parameters for CFD analysis.

Geometrical and operating parameters	Range
Entrance length of duct, “𝐿1”	245 mm
Test length of duct, “𝐿2”	280 mm
Exit length of duct, “𝐿3”	115 mm
Width of duct, “𝑊”	100 mm
Depth of duct, “𝐻”	20 mm
Hydraulic diameter of duct, “𝐷”	33.33 mm
Duct aspect ratio, “W/H”	5
Rib height, “𝑒”	0.7, 1.0, 1.4 and 2.0 mm
Rib Pitch, “𝑃”	10, 14.29, 20 and 28.58 mm
Reynolds number, “Re”	3800–18,000 (6 values)
Prandtl number, “Pr”	0.7441
Relative roughness pitch, “𝑃/𝑒”	14.29 (fixed value)
Relative roughness height, “𝑒/𝐷”	0.021, 0.03, 0.042 and 0.06